TypeError: Properties ['text'] passed to __init__ may not be existing property names. Valid property names are ...

[hari4742]

After setting up the project per instructions, When we drop the image the widow closes immediately with the terminal showing the following error:

The error originated from the Snackbar component where we were passing the text key to it. This is because kivymd module have some changes from version 1.1.1 to 1.2.0 as shown here

The module versions are:
kivy: 2.3.0
kivymd: 1.2.0

Suggested Fix:

Update replace of instances for Snackbar component as per the latest version i.e. 1.2.0 in the main-GUI.py file

Existing Code:

Snackbar(text="...").open()

Code to fix the issue:

MDSnackbar(MDLabel(text="...")).open()